Simulated stitching



Aug. 9, 1960 E. Doucl-IET SIMULATED STITCHING 3 Sheets-Sheet 1 Filed Dec. 8, 1955 SIMULATEDv STITCHING Filed Dec. 8. 1955 3 Sheets-Sheet 2 Allg 9, 1960 E. DoucHE'r 2,948,648

SIMULATED STITCHING Filed Deo. 8, 1955 3 Sheets-Sheet 3 YUnited States PatentO z,94s,s4s

SIMULATED sTrrcHlNG Eugene Douchet, Sarcelles, France, assignor of one-half to Society JOP, Sarcelles, and one-half` to Socit VTaulet v& Co., Villiers le lBel, France, both French societies Filed Dec. 8,1955, Ser. No. 551,839- claiis priority, application Belgium oct. 6, 195s rs'claims. (c1. 154-46) The U.S. patent application Serial 516,889 discloses a plastic sheet assembly useful in various fields of production such as the manufacture of upholstered seats, morocco articles and the like, together with a dev ice for producing said assembly. This assembly comprisestwo sheets of.` plasticmaterial having a suitable padding or stung interposed between them and bonded to each other along one or more lines, an elongated element of plastic material being bonded to the outer side of at least' one of said sheets substan-y tially along said lines, said element being preferablydyed in a color contrasting-with the color as said outer side of said sheet.

' The present invention has for itsfobject to'improve said assembly so as to have a perfect illusion of a saddlers stitch, the bonded assemblyhaving'the same appearance of it if it had been manufactured by machine stitching.

,According to the' invention, a twisted bicoloured cable is applied to the outer sheet at the position of each bond. cable mayV comprise at least two threads, one. of a clirst color and the other of a second color. The. said cable mayV also` comprise a` single thread having one portion of a first Ycolor and another portion of a second color.

One of the threads or one of the portions of the single thread may Vbe .of the same colour asl the outer sheet. The twisted cable `thus, give a perfect Yillusion of a saddlers stitch and ,the bonded assembly will have the same appearance as` if'it had been 'manufactured by machine stitchingbut with"theadvantage that` there are noneedle perforations wherebyit may be cleaned or washed without risk of deterioration.Y .y v

.The threads' or the two'portions ofthe single thread may also each Ybe of dierent colours from the sheet. Thus, theremaybe obtained an imitation fancy stitch, for example, chain'stitch' v c t .This invention also provides apparatus for producing a ,bonded assembly'comprising means for the application ofxa` thread or'cable whichmay .be twisted or not. .Accordingtwone specific embodiment, this apparatus is lcharacterised by ak plurality fof electrodes disposed to follow vthe generatn'ces 'of' a rotatable Y'cylinder jwhich is '2,948,648 Patented Aug; 9,1960

ice

' way of example, andwhich:

c'ausedtorotateatrthe'samer time asthe assembly'is 1 displaced in a direction perpendicular to the axis of the cylinder, each of said electrodes comprising a plate adapted to bond the thread or threads to the outer sheet of the bonded assembly and at least one presser plate which is movable vertically With reference to said plate, for maintaining the thread laterally, and which bonds the the assembly at the sides of the thread, flexible means being provided to displace the presser plate downwardly yvith reference to the said plate in such a manner that its 'lower edge projects beyond that of the said plate.

In another embodiment of the invention the apparatus may comprise an assembly of grooved wheels or rollers for bonding, the said wheels or rollers having parallel axes but staggered from one edge of the assembly in the direction opposite the direction of displacement of this assembly, each grooved wheel or roller having a median throat Y Fig. 1 shows a section on an enlarged scale of a rst embodiment of the bonded assembly.

Fig. 2 is a plan view corresponding to Fig. 1.

Fig. 3 is a sectional view of anotherembodiment o the bonded`assembly.. f

Fig. 4 is a plan view corresponding to Fig. 3.

Fig; 5 is a plan view of a device for manufacturing the assembly. i

i Fig. 6shows in elevation a detailjof the device of Fig. 5, i j Fig. 'l shows a plan view of a modification of the disposition of the grooved Wheels orrollers. Fig. 8 is'a perspective view of another device for manufacturing 'the assembly. i Fig. '9 is a perspective view partly in section illustrating a part of the `bonding device.

As shown in Figs. 1 and 2, the assembly'comprises two sheets ofplastic material 1 and 2 between which there c is provided a stit'eningor paddinglayer 3, the t-wo sheets being bonded one to the vother Vas indicated at Y4. Upon the sheet 1 at the position of the bonds 4`there is bonded a twisted thread or cable comprising two threads v2.5 and 26. Thethread $25 has'afcolour dilerent from that of the sheet 1; the thread-26 may have the same colour as this sheet in'which case thetwo sheets appear to be bonded one to the other by machine stitching ofthe saddle stitch-type,` althoughtthe'sheets in fact; have no perforations at`all.f The thread 26 may'also have a' colour different from that of the sheet 1. In the embodiment of Figs. 3V and 4, the twisted threads 25426 are replaced by a single cable comprising two portions ioff ditere'nt colors 34a and 34b .-and twisted about its axis. 'l f I In YorderY to produce the bonded assembly according to Ythe, invention, theapparatus of Figs. 5 and 6 Amay be v'used-in' the case of rectilinear bonds. ThisV apparatus which allows` continuous production vof a bonded 'assembly by displacing the' assembly in the direction of the arrow -27 is 'constituted by an assembly of grooved wheels or rollers 28 ywhose axes 29 are parallel but staggered in the direction opposite that of the arrow 27'from the two edges 30 and 31 of the assembly, in such a` manner that of the grooved wheels or rollers Z8 are simply staggered from the edge 30 in such a manner that the grooved wheels or rollers are located in a single row.

For producing the assembly, one may also use the device shown in Fig. 8, which comprises a plurality of electrodes shown in detail in Fig. 9 and indicated generally by 35. These electrodes are disposed to follow the generatrices of a cylinder 36 which is causedgto rotate around its axis 31- at the same time as the assembly formed by the sheets 1 and 2 and the padding 3 is displaced in the direction 38 perpendicular to the axis of the cylinder.

Each electrode comprises (Fig. 9) a metal plate '7 which is sandwiched between a pair of spaced presser plates 8 which are connected for bodily movement together with respect to `the intervening .bonding plate.7. The presser plates 8 are resiliently urged into engagement with the opposite faces of plate 7 b y an arrangement now to be described.

The electrode plate 7 is `formed with .holes .(-not shown in the drawing) and the presser ,plates 8 :are/formed with elongated slots 10 registering with Vsaid holes. Through the registering holes and slotsthere `extendpins 9 having threaded ends with nuts A14 screwed thereon. Inner annular washers 12 are mounted on the. pinsu9 in engagement with the presser plates 8 and outer vannular washers 13 are similarly mounted on the pins .9 in engagement with the nuts 14, the lwashers 12 and 13,:being urged away from each other by coilsprings-.ll `surrounding the pins. Means such'ashair-pinvsprings 15, :interposed between the presser plates 18 anda basel, fast with the cylinder 36 and connected with the.electrode plate 7 are providedfor urging the presserlplatesjin a i downward direction with respect to the electrode plate=7 so that the lower ends of the presser plateswill project beyond the lower ends of the electrode.

It will be apparent that -the invention has lbeen described only by way of example and thatvarious modilications may be made to the speciticdetailsdisclosed without in any way departing from its scope;I

What I claim is:

l. The combination of plastic sheet materialV having an outer visible surface, and simulated stitching .defined i by an exposed, bicolored, plastic cable twistedaboutits longitudinal axis and extending along said. surface: and bonded, along its entire length, to said surface.

2. The combination of plastic sheet material having an outer visible surface, `and simulated stitching defined by an exposed twisted, bicolored,rplastic `cable `extending along said surface and bonded, along its entire length, to said surface, said bicolored cable having .thetwo differently colored portions thereof arranged inintertwined helixes.

3. The combination of plastic sheet materialV having an outer visible surface, and simulated saddle stitching defined by an exposed twisted, bicolored, plastic cable extending along said surface and bonded,` along its entire length, to said surface, said bicolored cable having the two differently colored portions thereof arranged in intertwined helixes with onefof said portions being of the same color as said AYouter visible surface.

4. The combination of plastic sheet material having an outer visible surface, andsimulated chain stitching defined by an exposed twisted, bicolored, plastic rcable extending along said surface and bonded, along its entire length, to said surface, said bicolored cablerhaving `the two differently colored portionsthereof arranged inintertwined helixes with the colors of said portionsofthe cable being each different than the color of said .outer visible surface.

5. The combination of plastic sheet material having an outer visible surface, and simulated stitching defined by an exposed cable of two differently colored plastic cable extending along said outer visible surface and `being .bonded along its` entire .length .to .said outer visible surface.

6. The combination as in claim 5, wherein one of said two differently colored threads has the same color as said surface so that saddle stitchingiis simulated.

7. The combination asin c1aim,5, wherein both of said two threads have colors different from that of said surface `to simulate chain stitching on the latter.

8. The` combination ofrplastit:4 sheet material `having an outer visible surface, and simulatedstitching defined by an exposed plastic cable having differently colored diametrically opposed portions, said cable being twisted about its longitudinal axis, so that said' differently colored portions form intertwined helixes ofthe respective colors, and being bonded along its entire length to said surface.

9. A material for upholstery comprising two layers of plastic sheet material having compressible padding interposed therebetween and bonded `together along at leastV onerline, and an exposed, bicolored plasticcable bonded, along its entire length, to one of said layers along said line, said bicolored cable being twisted about itsilongitudinal axis and having the differently colored portions thereof arranged in intertwinedhelixes todenesimulated stitching.

10. A-material asin claim-9; wherein said differently colored portions of the cable are defined by individual threadstwisted together-to -form said intertwined-helixes.

1l. A material-as in claim 9; -wherein said cable is an integral elongated element Vhaving said differently colored portions at diametrically opposed sides thereof and forming said intertwined helixes by reason of the twist of -said cable.

12. A material as in claim 9; lwherein one ofisaid dif-` ferently colored portions s ofthe same color as said one layer so .that said intertwined helixes simulate saddle stitching along said line. i

13. A material asin claim 9;.wherein both of said differently colored portions have colors different from that of said one layer so.that,said intertwined helixes simulate a row of chain stitching along said line.

References Cited in the file of this patent UNITED STATES PATENTS Re. 21,800 Kahn ,etal May 13, 1941 445,228 Middleton Jan. 27, 189,1 915,882 Pianko Mar. `23, 1909 1,263,734 Bauer Ap1 .23,\.1918 1,976,237 Logan etal. Oct. 9, `1934 2,338,375 Donner Ian. 4, 1944 2,537,323 Wurzburger Jan. `9, 1951 2,560,923 Boersma et al. July 17, 1951 2,569,434 "Ischinger Sept. 25,1951 2,576,621 McBride et al. Nov 27, 1951 2,621,139 Messing Dec..9, 1952 2,633,442 Caldwell Mar.,-31, `1953 2,684,320 Lyijynen .Tuly `20, `1954 l2,758,045 Heatonet al Aug. 7, 1956 2,809,910 Deddo Oct. l5, 1957 

1. THE COMBINATION OF PLASTIC SHEET MATERIAL HAVING AN OUTER VISIBLE SURFACE, AND SIMULATED STITCHING DEFINED BY AN EXPOSED, BICOLORED, PLASTIC CABLE TWISTED ABOUT ITS LONGITUDINAL AXIS AND EXTENDING ALONG SAID SURFACE AND BONDED, ALONG ITS ENTIRE LENGTH, TO SAID SURFACE. 